man XtCallCallbacks (Fonctions bibliothèques) - process callbacks
NAME
XtCallCallbacks, XtCallCallbackList, XtHasCallbacks - process callbacks
SYNTAX
typedef enum {XtCallbackNoList, XtCallbackHasNone, XtCallbackHasSome} XtCallbackStatus; XtCallbackStatus XtHasCallbacks(Widget w, String callback_name);
ARGUMENTS
- callback_name
- Specifies the callback list.
- call_data
- Specifies a callback-list specific data value to pass to each of the callback procedure in the list.
- callbacks
- Specifies the callback list to be executed.
- w
- Specifies the widget.
DESCRIPTION
The function calls each procedure that is registered in the specified widget's callback list.
If callbacks is not NULL, calls each of the callback procedures in the list, passing client data and call_data. The callbacks parameter must specify the contents of a widget or object resource declared with representation type
The function first checks to see if the widget has a callback list identified by callback_name. If the callback list does not exist, returns If the callback list exists but is empty, it returns If the callback list exists and has at least one callback registered, it returns